The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2012
Filed:
Aug. 04, 2010
Applicants:
Francesca Costantino, Milan, IT;
Roberto Lenna, S. Giorgio Su Legnano, IT;
Silvia Piuri, Saronno, IT;
Inventors:
Francesca Costantino, Milan, IT;
Roberto Lenna, S. Giorgio Su Legnano, IT;
Silvia Piuri, Saronno, IT;
Assignee:
Industriale Chimica S.R.L., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J 53/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process is described for the preparation of drospirenone, a synthetic steroid with progestogenic, antimineralocorticoid and antiandrogenic activity, useful for preparing pharmaceutical compositions with contraceptive action by the oxidation of 17α-(3-hydroxypropyl)-6β,7β,15β, 16β-dimethylene-5β-androstane-3β,5,17β-triol.